Most Common Road Bike Cassette

Even if you have a bike with a standard front chainset 53 39 and rear cassette of 25 which gives you a lowest gear ratio of 39 25 1 56 you could achieve a similar gear ratio to a bike with a compact chainset 50 34 with a rear cassette of 25 ratio of 1 36 by switching your rear cassette to a 29 tooth lowest gear ratio of 39 29 giving a ratio of 1 34. The gearing you have on your road bike is one of the most important. The vast majority of road bikes come with a 12 25 cassette which is suitable for most cycling terrain when paired with a compact or standard chainset.

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When choosing cassettes you can choose a cassette that has a narrow range of ratios but closely spaced between each cog or you could choose a cassette that offers a wide range of ratios but at the cost of bigger jumps between cogs.

Most common road bike cassette. Most road bike cassettes have an 11 12 or 13 tooth smallest sprocket then between 21 and 32 teeth on the largest sprocket. On the mountain bike side sram s eagle wide range 10 50 cassettes are very popular though you ll also soon be seeing a 10 51 offering as part of the new shimano xtr groupset. For example most common road bike cassettes have ranges such as 11 25 11 28 11 30 and 11 32 all of which are made by shimano and sram the two largest cycling component makers. Road bike cassettes will have smaller sprockets with a smaller jump between the teeth sizes when compared to mountain bike cassettes.

A road bike groupset is the collection of components that make you stop and go in other words. However if you know you find the hills tough and feel you need an extra small gear a triple with a 30 tooth inner ring could make all the difference and if you often find yourself wanting an extra gear to push a little bit harder you might be better shifting up. Most road bikes will come with 11 12 or 13 teeth on the smallest sprocket and then will have anywhere between 21 and 32 teeth on the largest sprocket. Cassette read gears as mentioned earlier today s bikes typically come with 8 to 11 cogs in a cassette.

The larger chainring gives you bigger harder to turn gears that move you further per pedal revolution so it s suitable for higher speeds while the smaller chainring gives you gears that are easier to turn but move you a shorter distance per pedal revolution so it s suitable for lower speeds. Most road bikes come with a double chainset meaning that you have two chainrings. Most of us will get on quite well with a compact tweaking the rear cassette for a more racy feel or a climbing specific set up. A typical gear spread for an mtb cassette the amount of teeth on the smallest and largest sprockets would be 11 34t.

This used to be a common option. A 52 36t chainset married to a 11 28t cassette which is an increasingly common. Most mtb bikes use 9 10 11 or 12 speed cassettes although more budget models may use 8 or less commonly 7 speed. They typically differ from road bike cassettes in having greater gaps in gearing between each sprocket.

Road bike cassettes for climbing. For road bikes 11 28t is probably the most common cassette range.